DE102015211336A1 - Transceiver, vehicle, method and computer program for a transceiver - Google Patents

Abstract

Embodiments provide a transceiver (10), a vehicle (100), a method, and a computer program for a transceiver (10). The transceiver (10) for the vehicle (100) for communication in a mobile communication system (500) comprises one or more interfaces (12) for a plurality of antennas (50). The transceiver (10) further comprises transceiver means (14) adapted to communicate over the one or more interfaces (12) and over at least a portion of the plurality of antennas in the mobile communication system (500). The transceiver (10) further comprises a controller (16) configured to control the transceiver (14) and the one or more interfaces (12), the controller (16) being further configured to operate over a first subset (50a) of the plurality of antennas (50) to determine information about a radio channel between the first subset (50a) of antennas and a base station (20) of the mobile radio system (500) and transmit via a second subset (50b) of the plurality of antennas (50). 50) to communicate with the base station (20) of the mobile communication system (500).

Description

Technical area

Embodiments are concerned with a transceiver, a vehicle, a method, and a computer program for a transceiver, particularly, but not exclusively, with cooperative channel estimation using a plurality of possibly distributed antennas on a vehicle.

background

Mobile radio systems, especially on a cellular basis, have been around for several generations. Current network planning, as well as the advancement of cellular communication systems, is essentially based on stationary base stations that provide wireless data and communication services in their respective coverage areas, the so-called cells. In addition, communication between the terminals is directly conceivable (also English device-to-device communication). In this case, mobile terminals are used for providing the cordless services on the user side. For example, such mobile terminals are also used in vehicles. In the field of vehicles, there are other possibilities for the use of antenna systems than in the field of mobile phones, such as mobile phones. Mobile phones, computers, also engl. Smartphones, etc.

Today's vehicle antenna systems are designed for mobile connection to cellular mobile radio systems as well as broadcasting systems. In order to ensure the required data rates and quality requirements, predominantly individual antenna systems have been used for networking vehicles. In the current generation of various vehicle derivatives, multi-antenna systems are increasingly being installed (also known as multiple-input-multiple-output (MIMO) systems). These are e.g. two antennas mounted on a central location on the vehicle (centralized approach). Moreover, there are in the prior art multi-antenna concepts that exploit, for example, receiving diversity of signals received via multiple antennas. In addition, vehicles may have different antennas for different systems or services, e.g. Radio-receiving antennas, mobile radio antennas, antennas for navigation systems, etc.

Summary

Embodiments of the present invention are based on the core idea of providing an alternative concept (possibly paradigm shift in the partitioning of the vehicle networking architecture) for using antennas on a vehicle. A vehicle often offers the possibility of mounting and utilizing a plurality of antennas, for example also at different locations. It is a central idea of exemplary embodiments to subdivide a plurality of optionally distributed antennas of a vehicle into subgroups and to use one subgroup each for channel estimation and for communication or for the actual data exchange. Embodiments can thus use a larger number of antennas and thus benefit from the spatial distribution and possibly separation (decorrelation of the individual transmission paths) of the antennas.

Embodiments provide a transceiver for a vehicle for communication in a mobile communication system. The transceiver includes one or more interfaces for a plurality of antennas. The transceiver further includes transceiver means configured to communicate over the one or more interfaces and over at least a portion of the plurality of antennas in the mobile communication system. The transceiver includes a controller configured to control the transceiver and the one or more interfaces. The control device is further configured to determine, via a first subset of the plurality of antennas, information about a radio channel between the first subset of antennas and a base station of the mobile radio system and to communicate with the base station of the mobile radio system via a second subset of the plurality of antennas. Embodiments may enable a plurality of antennas to be exploited. Channel estimation and actual data communication can be performed via different subgroups (also called clusters) of antennas.

In some embodiments, the plurality of antennas may include two or more antennas of different orientation, different polarization, different mounting locations on the vehicle, different antenna gain, or different emission characteristics. Embodiments can thus make a variety of different antennas available, so that corresponding diversity gains, beamforming gains or multi-streaming gains can be realized. For example, the plurality of antennas may correspond to an antenna system having distributed distributed antennas. In embodiments, the information about the radio channel may include information about at least one direction of incidence of radio signals, for example relative to the vehicle.

In further embodiments, the controller may be configured to determine information about a radio channel between the second subset of the antennas and the base station of the mobile radio system based on the information about the radio channel between the first subset of the antennas and the base station of the mobile radio system. At least some embodiments may thus enable a prediction of the radio channel or a state of a radio channel of the second subgroup used for data communication based on a radio channel or a state of a radio channel of the first subgroup for channel estimation.

For example, the control device may also be designed to further take into account, in determining the information about the radio channel between the second subset of the antennas and the base station of the mobile radio system, a speed, availability information about the mobile radio system and / or a direction of travel of the vehicle. As such, some embodiments may enable channel prediction based on a state of motion of the vehicle or a network change foreseeable on the basis of the availability information. For example, the control device may be configured to determine via the one or more interfaces information about the speed, the availability information via the mobile radio system and / or the direction of travel of the vehicle. In some embodiments, vehicle sensors or data from vehicle sensors or from data memories may be used to achieve improved channel prediction or channel prediction.

The controller may, in some embodiments, be configured to determine the information about the radio channel between the second subset of the antennas and the base station of the mobile radio system based on the assumption that at least one antenna of the first subset of antennas is in front of at least one of the antennas Antenna of the second subset is arranged, or that at least one antenna of the second subset of antennas experiences the same radio channel as at least one antenna of the first subgroup delayed in time. In this respect, a kind of cooperative channel estimation can be made based on the expectation that the second subgroup will experience the same radio channel relationships as the first subgroup later in time, however. This can be achieved, for example, in that the first subgroup is arranged spatially so that it reaches a certain location due to the direction of travel of the vehicle, ahead of the second subgroup. The controller may be configured to adaptively adapt a selection of antennas from the plurality of antennas for the first and second subgroups of antennas. In this respect, cheap or profitable antennas can be determined and used, or it can be done to adapt a selection of cheaper antennas.

The control device can therefore also be designed to select the first subset of antennas based on a direction of travel of the vehicle so that the first subgroup is arranged in the direction of travel of the vehicle in front of the second subgroup. In this respect, the selection of the antennas for the two subgroups can be adapted to the direction of travel and the radio conditions in some embodiments. For example, the controller may be configured to adaptively adapt a number of antennas in the first subset and / or in the second subset of antennas, e.g. based on a radio channel estimated via the first subset.

In further embodiments, the transceiver device may include two or more transceiver modules coupled to the antennas of the plurality of antennas. Some embodiments can thus allocate channel estimation and data communication, if necessary, to separate transceiver modules. The control device can be designed to carry out beamforming (also called beamforming) with respect to the base station of the mobile radio system via the antennas in the second subgroup. Some embodiments may thus employ within the second subset of antennas signal processing schemes associated with additional capacity or signal gains. For example, the controller may be configured to adaptively adapt beamforming via the antennas in the second subset, e.g. to adapt the beam shaping based on the respective radio and interference situation.

Embodiments also provide a vehicle having an embodiment of the transceiver described above. The plurality of antennas may be included in the vehicle. For example, the first subset of antennas may comprise the same number of antennas as the second subset of antennas. This may facilitate channel estimation in embodiments since the same number of antennas are used for channel estimation and data transmission. Furthermore, the antennas of the first subgroup may have the same geometry as the antennas of the second subgroup. In some embodiments, the channel estimation for the second subgroup can be further facilitated because no adaptation due to different geometries between the antennas in the subgroups is necessary. In addition, in some According to further embodiments, the antennas of the first subgroup have the same antenna characteristics as the antennas of the second subgroup. In such embodiments, the estimate for the channel of the second subset may be simplified accordingly. The first subset may include other antennas than the second subset in embodiments.

Embodiments further provide a method for a transceiver for a vehicle for communication in a mobile radio system. The method includes determining information about a radio channel between a first subset of antennas of a plurality of antennas and a base station of the mobile radio system. The method further comprises communicating with the base station of the mobile radio system via a second subset of the plurality of antennas.

Embodiments further provide a computer program for performing at least one of the above-described methods when the computer program runs on a computer, a processor or a programmable hardware component. Embodiments also provide a digital storage medium that is machine or computer readable and that has electronically readable control signals that can cooperate with a programmable hardware component to perform one of the methods described above.

Brief Description

Embodiments are explained below with reference to the accompanying figures. Show it:

1 an embodiment of a transceiver for a vehicle;

2 an embodiment of a vehicle with an embodiment of a transceiver;

3 a further embodiment of a vehicle with an embodiment of a transceiver;

4 an embodiment of a vehicle with an embodiment of a transceiver with adaptive antenna selection; and

5 a block diagram of an embodiment of a method for a transceiver.

description

Various embodiments will now be described in more detail with reference to the accompanying drawings, in which some embodiments are illustrated. In the figures, the thickness dimensions of lines, layers and / or regions may be exaggerated for the sake of clarity.

In the following description of the attached figures, which show only some exemplary embodiments, like reference characters may designate the same or similar components. Further, summary reference numerals may be used for components and objects that occur multiple times in one embodiment or in a drawing but are described together in terms of one or more features. Components or objects which are described by the same or by the same reference numerals may be the same, but possibly also different, in terms of individual, several or all features, for example their dimensions, unless otherwise explicitly or implicitly stated in the description.

Although embodiments may be modified and changed in various ways, exemplary embodiments are illustrated in the figures as examples and will be described in detail herein. It should be understood, however, that it is not intended to limit embodiments to the particular forms disclosed, but that embodiments are intended to cover all functional and / or structural modifications, equivalents and alternatives that are within the scope of the invention. Like reference numerals designate like or similar elements throughout the description of the figures.

Note that an element referred to as being "connected" or "coupled" to another element may be directly connected or coupled to the other element, or intervening elements may be present. Conversely, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements. Other terms used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" versus "directly in between," "adjacent" versus "directly adjacent," etc.).

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be the embodiments restrict. As used herein, the singular forms "a,""a,""an," and "the" are also meant to include the plural forms unless the context clearly indicates otherwise. Further, it should be understood that the terms such as "including,""including,""having,""comprising,""comprising," and "having," as used herein, includes the presence of said features, integers, steps, Specify operations, elements, and / or components, but do not preclude the presence or addition of one or more features, integers, steps, operations, elements, components, and / or groups thereof.

Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly assigned to one of ordinary skill in the art to which the embodiments pertain. Further, it should be understood that terms, e.g. those that are defined in commonly used dictionaries are to be interpreted as having the meaning consistent with their meaning in the context of the relevant art, and not to be interpreted in an idealized or overly formal sense, unless this is so is explicitly defined.

Embodiments may use concepts for channel estimation that use at least one estimation and one receive antenna and that are aimed at optimizing or improving message transmission while driving. Under certain circumstances, several, in the direction of travel successively arranged estimating antennas are in use here. Embodiments may make use of decentralized or distributed antenna systems which enable a cooperative channel estimation between the spatially separated antennas.

1 shows an embodiment of a transceiver 10 for a vehicle 100 for communication in a mobile radio system 500 , Here and below, the term vehicle, for example, a motor vehicle (motor vehicle), a car, a bus, a train, an aircraft, a ship, a bicycle, etc. understood. The transceiver 10 can be designed as a whole unit, for example, as an electrical circuit or module adapted for use in a vehicle. In some embodiments, the transceiver may also be integrated with other components, eg, in a transceiver, which together with a base station transceiver is a mobile relay transceiver for the vehicle 100 forms. As the 1 With reference to the dashed lines, embodiments also provide a vehicle 100 that the transceiver 10 includes.

In embodiments, the mobile radio system 500 For example, one of the mobile radio systems that are standardized by appropriate standardization bodies, such as the 3rd Generation Partnership Project (3GPP) group. For example, these include the Global System for Mobile Communications (GSM), Enhanced Data Rates for GSM Evolution (EDGE), GSM EDGE Radio Access Network (GERAN), the Universal Terrestrial Radio Access Network (UTRAN), or the Evolved UTRAN (EUTRAN) z. As the Universal Mobile Telecommunications System (UMTS), Long Term Evolution (LTE) or LTE Advanced (LTE-A), or other mobile systems other such. For example, the Worldwide Interoperability for Microwave Access (WIMAX), IEEE802.16 or Wireless Local Area Network (WLAN), IEEE802.11 and, more generally, a system known as Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Code Division Multiple Access (also known as Code Division Multiple Access) Access (CDMA) "), Orthogonal Frequency Division Multiple Access (OFDMA)" or other technology or multiple access methods. In the following, the terms mobile radio system, mobile network and mobile network are used synonymously.

The following is assumed that such a mobile system 500 at least one stationary transceiver in the sense of a base station 20 includes a connection to the wired part of the mobile network. On the other hand, it is assumed that the mobile network at least one mobile transceiver 10 (Mobile terminal), wherein the term mobile is here to refer to that with this transceiver over the air interface, ie wireless / cordless, is communicated. Such a mobile transceiver may, for example, correspond to a portable telephone, a smartphone, a tablet computer, a portable computer or a radio module that is not necessarily mobile in the sense that it is actually moving in relation to its surroundings. The transceiver may also be stationary (eg, relative to a car) but communicate wirelessly with the cellular network. In this respect, the already mentioned base station of a base station can comply with one of the above-mentioned standards, for example a NodeB, an eNodeB, etc.

A base station transceiver or base station (these terms may be equivalently used) may be configured to communicate with and in or adjacent to one or more active mobiles Supply area of another base station transceiver or a base station to communicate, for example as a macro cell base station or as a small cell base station. Thus, embodiments may include a mobile communication system having one or more mobile stations and one or more base stations, wherein the base station transceivers may provide macrocells or small cells, e.g. B. pico, metro or femto cells. A mobile transceiver or mobile terminal may include a smartphone (smart phone), a cell phone, a user device, a radio, a mobile, a mobile station, a laptop, a notebook, a personal computer (PC), a personal digital assistant (PDA), a Universal Serial Bus (USB) stick or adapter, a car, etc. A mobile transceiver can also as Engl. "User Equipment (UE)" or mobile in accordance with 3GPP terminology.

A base station transceiver or base station may be located at least from the perspective of a mobile station in a fixed or at least fixed part of the network or system. A base station transceiver or base station may also be a remote radio head, a relay station, a transmission point, an access point, a radio, a macrocell, a small cell, a microcell, a femtocell, a metro cell, etc. correspond. A base station or a base station transceiver is thus understood as a logical concept of a node / unit for providing a radio bearer or radio links over the air interface, through which or the terminal / mobile transceiver access to a mobile network is provided.

A base station or base station transceiver may be a wireless interface for mobile terminals to a wired network. The radio signals used may be radio signals standardized by 3GPP or, in general, radio signals in accordance with one or more of the above-mentioned systems. Thus, a base station or a base station transceiver may correspond to a NodeB, an eNodeB, a base transceiver station (BTS), an access point, a remote radio head, a transmission point, a relay station, etc., which may be subdivided into further functional units.

A mobile station or mobile transceiver may be associated with or registered with a base station or cell. The term cell refers to a coverage area of the radio services provided by a base station, e.g. from a NodeB (NB), an eNodeB (eNB), a Remote Radio Head, a transmission point, a relay station, etc. A base station may provide one or more cells on one or more carrier frequencies. In some embodiments, a cell may also correspond to a sector. For example, For example, sectors with sector antennas formed to cover an angular portion around an antenna site may be formed. For example, in some embodiments, a base station may be configured to operate three or six cells or sectors (e.g., 120 ° in the case of three cells and 60 ° in the case of six cells). A base station may include multiple sector antennas. In the following, the terms cell and base station can also be used interchangeably.

In other words, in the embodiments, the mobile communication system may also include a heterogeneous cell network (HetNet) having different cell types, e.g. Closed Subscriber Groups (CSGs) and open cells, as well as cells of different sizes, e.g. Macrocells and small cells, wherein the coverage area of a small cell is smaller than the coverage area of a macrocell. A small cell may correspond to a metro cell, a microcell, a picocell, a femtocell, and so on. The coverage areas of the individual cells are provided by the base stations for their service areas and depend on the transmission powers of the base stations and the interference conditions in the respective area. In some embodiments, coverage area of a small cell may be at least partially surrounded by a coverage area of another cell or may be partially connected to the coverage area of e.g. Macro cell match or overlap. Small cells can be used to extend the capacity of the network. A metro cell can therefore be used to cover a smaller area than a macrocell, e.g. Metrocells are used to cover a road or a section in a metropolitan area. For a macrocell, the coverage area may be on the order of one kilometer or more in diameter, for a microcell the coverage area may be less than one kilometer in diameter, and a picocell may have a coverage area less than 100 meters in diameter. A femto cell may have the smallest coverage area and may be used to cover, for example, a home, a car or a gate area at the airport, i. Their transmission area can have a diameter of less than 50m.

The 1 further shows that the transceiver 10 one or more interfaces 12 which are adapted to be connected to a plurality of antennas 50 to communicate. The plurality of antennas is in the 1 medium 4 Antenna symbols shown and may in embodiments also include more or fewer antennas, for example, two or more antennas. A single antenna or a single antenna element may have different shape, shape and properties. For example, dipole antennas, patch antennas, patch antennas, array antennas, magnetic antennas, etc. and their elements can be used.

In embodiments, the one or more interfaces 12 be designed as any interfaces that are suitable for such communication. Conceivable here are any implementations involving the exchange of data or control contents, radio signals, radio-frequency signals between the plurality of antennas and a transceiver device 14 , which will be explained in more detail below, allow. For example, any serial or even parallel, analog as well as digital, interfaces are conceivable. In some embodiments, the radio signals may be formed only in the immediate vicinity of the respective antennas or antenna elements. Accordingly, the antennas and corresponding amplifier, converter, mixer, converter, engl. Remote Radio Heads (RRHs) etc. include. In this respect, over the one or more interfaces 12 Baseband data can also be communicated in digital or discrete form. In embodiments, the transceiver device 12 two or more transceiver modules, eg, RRHs, include those with the plurality of antennas 50 and / or subgroups 50a . 50b are coupled.

As the 1 shows, includes the embodiment of the transceiver 10 a transceiver device 14 which is designed to be over the one or more interfaces 12 and over at least part of the plurality of antennas 50 in the mobile radio system 500 to communicate. The transceiver device 14 is with the one or more interfaces 12 coupled. In embodiments, the transceiver device 14 typical transmitter or receiver components included. These may include, for example, one or more filters, one or more mixers, one or more amplifiers, one or more diplexers, one or more duplexers, and so on. Depending on the implementation, the aforementioned components in the transceiver device 14 be formed or in or at the antennas 50 ,

As the 1 further shows, the transceiver comprises 10 Furthermore, a control device 16 , which is adapted to the transceiver device 14 and the one or more interfaces 12 to control. The control device 16 is with the transceiver device 14 and the one or more interfaces 14 coupled. The control device 16 is further configured to be via a first subset 50a the plurality of antennas 50 Information about a radio channel between the first subgroup 50a and a base station 20 of the mobile radio system 500 to determine. The control device 16 is further configured to be via a second subset 50b the plurality of antennas 50 with the base station 20 of the mobile radio system 500 to communicate. The first or the second subgroup 50a . 50b may be one or more antennas of the plurality of antennas 50 include.

In embodiments, the control device 16 correspond to any controller or processor or programmable hardware component. For example, the control device 16 also be implemented as software that is programmed for a corresponding hardware component. In this respect, the control device 16 be implemented as programmable hardware with appropriately adapted software. Any number of processors, such as Digital Signal Processors (DSPs), can be used. Embodiments are not limited to a particular type of processor. There are any processors or even multiple processors to implement the control device 16 conceivable.

Although in the in the 1 illustrated embodiment, the plurality of antennas are shown with the same symbols, the individual antennas of the plurality of antennas 50 differ. For example, antennas of different orientation, different polarization, different mounting locations on the vehicle 100 , different antenna gain, or different emission characteristics in the plurality of antennas 50 includes his. The majority of antennas 50 may correspond to an antenna system with distributed and / or distributed antennas. This may be the structure or the shape of the vehicle 100 be used to the antennas at different points of the vehicle 100 to install and align differently. Embodiments may thus exploit, for example, the diversity of the antennas, since these may possibly provide independent or different reception and / or transmission properties due to the different mounting locations, orientation, polarization, etc.

Some embodiments can also make use of beam-forming concepts and thereby control a plurality of antennas so that their radio signals for specific spatial directions targeted constructive (eg in the direction of the base station) or destructive (eg for spatial Blanking out a disturber). The control device 16 may be configured to at least over the antennas in the second subgroup 50b a beam shaping with respect to the base station 20 of the mobile radio system 500 perform. Possibly. can also be within the first subgroup 50a a corresponding beam-shaping concept may be taken into account when determining the information about the radio channel, for example by identical beam-shaping gains within the subgroups 50a and 50b to take into account. In some embodiments, the control device 16 be configured to beamform over the antennas in the second subset 50b adaptively, for example by so-called adaptive beamforming or adaptive beam switching (also beam switching) or other concepts in the field of so-called "intelligent antennas". In embodiments, the control device 16 the one or more interfaces 12 , directly or indirectly, for example via the transceiver device 14 , for example, in the sense of a switch, a switching matrix or a multi / / diplexer control and so each one or more antennas subgroups 50a . 50b assign or assign. In some embodiments, the control device 16 Signals for individual antennas or subgroups 50a . 50b also process accordingly, ie influence, combine, filter, etc. in amount and phase, for example.

2 shows an embodiment of a vehicle 100 with an embodiment of a transceiver 10 as described above. The two subgroups of antennas 50a and 50b be in the 2 symbolized by one antenna each. It is also assumed that the two subgroups 50a and 50b have a distance Δd to each other. This distance may refer to two antennas in the different groups, in principle, groups with the same number of antennas and the same geometric arrangement within a group are also conceivable, in which case the distance .DELTA.d would be present between mutually corresponding antennas of the groups. The 3 shows a further embodiment of a vehicle 100 with an embodiment of a transceiver 10 , The embodiment of 3 shows three antennas each in the subgroups 50a and 50b which each have the same geometric arrangement with each other. The embodiment of the vehicle 100 includes the plurality of antennas 50 , where the first subgroup 50a of antennas comprises the same number of antennas as the second subgroup 50b of antennas. In this embodiment, the antennas of the first subgroup 50a the same geometry as the antennas of the second subgroup 50b , In addition, the antennas of the first subgroup 50a the same antenna characteristics as the antennas of the second subgroup 50b , The first subgroup 50a However, it includes correspondingly different antennas than the second subgroup 50b , and mutually corresponding antennas each have the same distance from each other.

In the embodiment of 3 becomes the first subgroup 50a used to estimate the spatial channel properties. The information about the radio channel corresponds for example to information about at least one direction of incidence of radio signals. Accordingly, from the information about the direction of arrival at the first subgroup 50a on the upcoming direction of incidence at the second subgroup 50b be closed, assuming that the vehicle is in the direction of the second subgroup 50b moved to the first subgroup.

The control device 16 according to the 1 is then adapted to use the information about the radio channel between the first subgroup 50a the antennas and the base station 20 of the mobile radio system 500 Information about an estimate of a radio channel between the second subgroup 50b the antennas and the base station 20 of the mobile radio system 500 to determine. The control device 16 For example, it may be configured to receive the information about the radio channel between the second subgroup 50b the antennas and the base station 20 of the mobile radio system 500 based on the assumption to determine that at least one antenna of the first subgroup 50a of antennas in a direction of travel of the vehicle 100 before at least one antenna of the second subgroup 50b is arranged ( 3 shows this geometric relationship for all antennas of the first and second subgroups 50a . 50b ). When the vehicle 100 now moved forward, ie in the direction of the second subgroup 50b to the first subgroup 50a , learns the second subgroup 50b the same radio channel as the first subgroup 50a delayed in time. The control device 16 may then be configured, for example, the information about the radio channel between the second subgroup 50b the antennas and the base station 20 of the mobile radio system 500 based on the assumption to determine that an antenna of the second subgroup 50b of antennas the same radio channel as an antenna of the first subgroup 50a experiences delayed.

In the in the 3 The embodiment shown corresponds to the plurality of antennas 50 an antenna system with decentralized and / or distributed antennas. In principle, the antennas in any form or arrangement over the vehicle 100 be distributed. In some embodiments, a central starting point for the present measures is a distributed antenna system a cooperative channel estimation method can be used. An essential feature of a distributed antenna system is an arbitrarily spatially separated arrangement of one or more antennas per location. The cooperative channel estimation may make it possible to draw conclusions about the channel parameters and their influence on the message transmission by using known and established methods / algorithms for channel estimation at the estimation antennas. Core property of cooperative channel estimation vs. Non-cooperative channel estimation may be exploitation of the information gain by evaluating the spatial diversity of the distributed antenna system.

The vehicle antenna system or the plurality of antennas 50 , can consist of several distributed individual antennas or single antenna systems. In the embodiments of the 3 becomes an estimation cluster (first subgroup 50a ) and an adaptation antenna cluster (second subgroup 50b ) each with several antennas divided. The Estimation Antenna Cluster 50a is responsible for cooperative channel estimation and provides one or more relevant channel parameters such as signal-to-noise ratio (SNR), signal-to-interference ratio (also known as signal-to-noise ratio). to Interference Ratio (SIR)), Signal-to-Noise-and-Interference Ratio (SINR), Receive Level or Power (also English Receive Singal Strength Indicator (RSSI) or Receive Signal Code Power (RSCP)), a bit energy E _b in relation to a noise power density N ₀ , a noise power (also English channel noise) and / or Angle of arrival ,

In a further embodiment, the control device 16 configured to determine the information about the radio channel between the second subgroup 50b the antennas and the base station 20 of the mobile radio system 500 Furthermore, a speed, availability information about the mobile radio system and / or a direction of travel of the vehicle 100 to take into account. The control device 16 may then be further configured to communicate over the one or more interfaces 12 Information about the speed, the availability information about the mobile radio system and / or the direction of travel of the vehicle 100 to determine. The availability information can be, for example, information about a current traffic situation (eg Real Time Traffic Information), information about availability maps of the mobile radio system, information about a network of the mobile radio system (eg cell distribution, frequency distribution, distribution / availability of cells of other systems) , etc. include.

By combining and statistically analyzing multiple sensor data (such as speed and direction of travel) and cooperative availability data, channel estimation takes into account multiple inputs to provide more accurate predictions about channel characteristics (eg channel or frequency forecasting, system availability, etc .) to meet. The spatial separation of both clusters 50a . 50b generates in this embodiment, a time advantage which can be additionally utilized in the channel estimation. Thus, this method can also be applied to highly mobile scenarios that may be subject to rapid changes in channel parameters. A central control unit (CU) as an implementation of the control facility 16 interprets the available data, exchanges information with the autonomous Remote Radio Heads and, if necessary, enables an antenna change in the Adaptation Antenna Cluster or the second subgroup 50b ,

In a further embodiment, the control device 16 configured to be a selection of antennas from the plurality of antennas 50 for the first and second subgroups 50a . 50b Adaptively adapt antennas. As already explained above, the control device 16 be trained to be the first subgroup 50a of antennas based on a direction of travel of the vehicle 100 to select so that at least one antenna of the first subgroup 50 in the direction of travel of the vehicle 100 before at least one antenna of the second subgroup 50b is arranged. In addition, the control device 16 be formed to a number of antennas in the first subgroup 50a and / or in the second subgroup 50b Adaptively adapt antennas. 4 shows an embodiment of a vehicle 100 with an embodiment of a transceiver 10 with adaptive antenna selection. 4 shows a time sequence of an antenna selection for the second subgroup 50b of a vehicle 100 , In this embodiment, the vehicle 6 has antennas, with the front three antennas for the first subgroup 50a are selected. It is further assumed that a voice connection exists over the second subset 50b is served. In the left scenario, the left rear antenna is selected for the voice connection, whereas in the right scenario, the right rear antenna is selected. The basis for this selection is a channel estimation over the antennas of the first subgroup 50a ,

In embodiments, an improved or even the best possible performance and Reliability (also English) for the message transmission, for example in the context of a telephone conversation, be guaranteed. Optionally, even the termination of a connection can be prevented. In addition, in the adaptation antenna cluster 50b the method of adaptive beamforming (beamforming) is applied to the emission characteristic of the active antenna 50b ideal for the base station 20 align. Some embodiments may provide performance enhancement in terms of maximum data rate and reliability, and may improve quality of service or even provide best quality of service (QoS) for message transmission. Embodiments can also be used in highly mobile scenarios.

5 shows a block diagram of an embodiment of a method for a transceiver 10 for a vehicle 100 for communication in a mobile radio system 500 , The method includes determining 22 information about a radio channel between the transceiver 10 and a base station 20 of the mobile radio system 500 over a first subgroup 50a a plurality of antennas 50 , The method further includes communicating 24 with the base station 20 of the mobile radio system 500 over a second subgroup 50b the plurality of antennas 50 ,

Another embodiment is a computer program for performing at least one of the methods described above when the computer program runs on a computer, a processor, or a programmable hardware component. Another embodiment is also a digital storage medium that is machine or computer readable and that has electronically readable control signals that can cooperate with a programmable hardware component to perform one of the methods described above.

The features disclosed in the foregoing description, the appended claims and the appended figures may be taken to be and effect both individually and in any combination for the realization of an embodiment in its various forms.

Although some aspects have been described in the context of a device, it will be understood that these aspects also constitute a description of the corresponding method, so that a block or a component of a device is also to be understood as a corresponding method step or as a feature of a method step. Similarly, aspects described in connection with or as a method step also represent a description of a corresponding block or detail or feature of a corresponding device.

Depending on particular implementation requirements, embodiments of the invention may be implemented in hardware or in software. The implementation may be performed using a digital storage medium, such as a floppy disk, a DVD, a Blu-Ray Disc, a CD, a ROM, a PROM, an EPROM, an EEPROM or FLASH memory, a hard disk, or other magnetic disk or optical memory are stored on the electronically readable control signals, which can cooperate with a programmable hardware component or cooperate such that the respective method is performed.

A programmable hardware component may be integrated by a processor, a central processing unit (CPU), a graphics processing unit (GPU), a computer, a computer system, an application-specific integrated circuit (ASIC) Circuit (IC = Integrated Circuit), a system on chip (SOC) system, a programmable logic element or a field programmable gate array with a microprocessor (FPGA = Field Programmable Gate Array) may be formed.

The digital storage medium may therefore be machine or computer readable. Thus, some embodiments include a data carrier having electronically readable control signals capable of interacting with a programmable computer system or programmable hardware component such that one of the methods described herein is performed. One embodiment is thus a data carrier (or a digital storage medium or a computer readable medium) on which the program is recorded for performing any of the methods described herein.

In general, embodiments of the present invention may be implemented as a program, firmware, computer program, or computer program product having program code or data, the program code or data operative to perform one of the methods when the program resides on a processor or a computer programmable hardware component expires. The program code or the data can also be stored, for example, on a machine-readable carrier or data carrier. The program code or the data can be used inter alia as source code, Machine code or bytecode and as other intermediate code.

Another embodiment is further a data stream, a signal sequence, or a sequence of signals that represents the program for performing any of the methods described herein. The data stream, the signal sequence or the sequence of signals can be configured, for example, to be transferred via a data communication connection, for example via the Internet or another network. Embodiments are also data representing signal sequences that are suitable for transmission over a network or a data communication connection, the data representing the program.

For example, a program according to one embodiment may implement one of the methods during its execution by, for example, reading or writing one or more data into memory locations, optionally switching operations or other operations in transistor structures, amplifier structures, or other electrical, optical, magnetic or caused by another operating principle working components. Accordingly, by reading a memory location, data, values, sensor values or other information can be detected, determined or measured by a program. A program can therefore acquire, determine or measure quantities, values, measured variables and other information by reading from one or more storage locations, as well as effect, initiate or execute an action by writing to one or more storage locations and control other devices, machines and components ,

The embodiments described above are merely illustrative of the principles of the present invention. It will be understood that modifications and variations of the arrangements and details described herein will be apparent to others of ordinary skill in the art. Therefore, it is intended that the invention be limited only by the scope of the appended claims and not by the specific details presented in the description and explanation of the embodiments herein.

LIST OF REFERENCE NUMBERS

10

transceiver

12

one or more interfaces

14

Transceiver

16

control device

20

base station

22

Determine

24

Communicate

50

Plurality of antennas

50a

first subgroup of antennas

50b

second subgroup of antennas

100

vehicle

500

mobile system

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited non-patent literature

• IEEE802.16 [0029]
• Wireless Local Area Network (WLAN), IEEE802.11 [0029]

Claims (22)

A transceiver ( 10 ) for a vehicle ( 100 ) for communication in a mobile radio system ( 500 ), with one or more interfaces ( 12 ) for a plurality of antennas ( 50 ); a transceiver device ( 14 ), which is designed to communicate via the one or more interfaces ( 12 ) and at least a part of the plurality of antennas in the mobile radio system ( 500 ) to communicate; and a control device ( 16 ), which is designed to receive the transceiver device ( 14 ) and the one or more interfaces ( 12 ), the control device ( 16 ) is further configured to be distributed over a first subgroup ( 50a ) of the plurality of antennas ( 50 ) Information about a radio channel between the first subgroup ( 50a ) of antennas and a base station ( 20 ) of the mobile radio system ( 500 ) and a second subgroup ( 50b ) of the plurality of antennas ( 50 ) with the base station ( 20 ) of the mobile radio system ( 500 ) to communicate. Transceiver ( 10 ) according to claim 1, wherein the plurality of antennas ( 50 ) Antennas of different orientation, different polarization, different mounting locations on the vehicle ( 100 ), different antenna gain, or different emission characteristics, and / or wherein the plurality of antennas ( 50 ) corresponds to an antenna system with decentralized and / or distributed antennas. Transceiver ( 10 ) according to one of claims 1 or 2, wherein the information about the radio channel comprises information about at least one direction of incidence of radio signals. Transceiver ( 10 ) according to one of the preceding claims, wherein the control device ( 16 ) is designed to be based on the information about the radio channel between the first subgroup ( 50a ) of the antennas and the base station ( 20 ) of the mobile radio system ( 500 ) Information about a radio channel between the second subgroup ( 50b ) of the antennas and the base station ( 20 ) of the mobile radio system ( 500 ). Transceiver ( 10 ) according to claim 4, wherein the control device ( 16 ) is adapted to be used in determining the information about the radio channel between the second subgroup ( 50b ) of the antennas and the base station ( 20 ) of the mobile radio system ( 500 ) Furthermore, a speed, availability information about the mobile radio system and / or a direction of travel of the vehicle ( 100 ). Transceiver ( 10 ) according to claim 5, wherein the control device ( 16 ) is configured to communicate via the one or more interfaces information about the speed, the availability information via the mobile radio system and / or the direction of travel of the vehicle ( 100 ). Transceiver ( 10 ) according to one of claims 4 to 6, wherein the control device ( 16 ) is adapted to transmit the information about the radio channel between the second subgroup ( 50b ) of the antennas and the base station ( 20 ) of the mobile radio system ( 500 ) based on the assumption that at least one antenna of the first subgroup ( 50a ) of antennas in a direction of travel of the vehicle ( 100 ) in front of at least one antenna of the second subgroup ( 50b ), and / or that an antenna of the second subgroup ( 50b ) of antennas the same radio channel as an antenna of the first subgroup ( 50a ) experiences a time delay. Transceiver ( 10 ) according to one of the preceding claims, wherein the control device ( 16 ) is adapted to select a selection of antennas from the plurality of antennas ( 50 ) for the first and second subgroups ( 50a ; 50b ) adaptively adapt antennas. Transceiver ( 10 ) according to one of claims 7 or 8, wherein the control device ( 16 ) is adapted to the first subgroup ( 50a ) of antennas based on a direction of travel of the vehicle ( 100 ) such that at least one antenna of the first subgroup ( 50 ) in the direction of travel of the vehicle ( 100 ) in front of at least one antenna of the second subgroup ( 50b ) is arranged. Transceiver ( 10 ) according to one of the preceding claims, wherein the control device ( 16 ) is adapted to a number of antennas in the first subgroup ( 50a ) and / or in the second subgroup ( 50b ) adaptively adapt antennas. Transceiver ( 10 ) according to one of the preceding claims, in which the transceiver device ( 12 ) comprises two or more transceiver modules connected to the plurality of antennas ( 50 ) are coupled. Transceiver ( 10 ) according to one of the preceding claims, wherein the control device ( 16 ) is designed to be connected via the antennas in the second subgroup ( 50b ) beam shaping with respect to the base station ( 20 ) of the mobile radio system ( 500 ). Transceiver ( 10 ) according to claim 12, wherein the control device ( 16 ) is designed to beamforming via the antennas in the second subset ( 50b ) adaptively adapt. Vehicle ( 100 ) with a transceiver ( 10 ) according to one of the preceding claims. Vehicle ( 100 ) according to claim 14, further comprising the plurality of antennas ( 50 ), the first subgroup ( 50a ) of antennas comprises the same number of antennas as the second subgroup ( 50b ) of antennas. Vehicle ( 100 ) according to claim 15, wherein the antennas of the first subgroup ( 50a ) have the same geometry as the antennas of the second subgroup ( 50b ). Vehicle ( 100 ) according to one of claims 15 or 16, wherein the antennas of the first subgroup ( 50a ) have the same antenna characteristics as the antennas of the second subgroup ( 50b ). Vehicle ( 100 ) according to one of claims 15 to 17, wherein the first subgroup ( 50a ) antennas other than the second subgroup ( 50b ). A method for a transceiver ( 10 ) for a vehicle ( 100 ) for communication in a mobile radio system ( 500 ), With Determine ( 22 ) information about a radio channel between a first subgroup ( 50a ) of antennas of a plurality of antennas ( 50 ) and a base station ( 20 ) of the mobile radio system ( 500 ); Communicate ( 24 ) with the base station ( 20 ) of the mobile radio system ( 500 ) via a second subgroup ( 50b ) of the plurality of antennas ( 50 ).  A computer program for performing the method of claim 19 when the computer program runs on a computer, a processor or a programmable hardware component.

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